航路航管服务
enroute traffic control service
修正最陡下降路径
modified steepest decent path
《英版航路指南》
admiralty sailing directions
长江口北槽下航道
Yangzi estuary north trough lower sea-route
场站及航路导航设施
terminal and en-route navigation facilities
超高速水下航行器
superspeed underwater vehicle
超空泡水下航行器
underwater supercavitating vehicle
超空泡水下航行体
supercavitating underwater vehicle